C++ (Cpp) DBException::isLostConnection示例

示例#1

文件： db_interface_mysql.cpp 项目： kissthink/kbengine

//-------------------------------------------------------------------------------------
bool DBInterfaceMysql::processException(std::exception & e)
{
	DBException* dbe = static_cast<DBException*>(&e);
	bool retry = false;

	if (dbe->isLostConnection())
	{
		INFO_MSG(boost::format("DBInterfaceMysql::processException: "
				"Thread %p lost connection to database. Exception: %s. "
				"Attempting to reconnect.\n") %
			this %
			dbe->what() );

		int attempts = 1;

		while (!this->reattach())
		{
			ERROR_MSG(boost::format("DBInterfaceMysql::processException: "
							"Thread %p reconnect(%s) attempt %d failed(%s).\n") %
						this %
						db_name_ %
						attempts %
						getLastError());

			KBEngine::sleep(30);
			++attempts;
		}

		INFO_MSG(boost::format("DBInterfaceMysql::processException: "
					"Thread %p reconnected(%s). Attempts = %d\n") %
				this %
				db_name_ %
				attempts);

		retry = true;
	}
	else if (dbe->shouldRetry())
	{
		WARNING_MSG(boost::format("DBInterfaceMysql::processException: Retrying %1%\nException:%2%\nnlastquery=%3%\n") %
				this % dbe->what() % lastquery_);

		retry = true;
	}
	else
	{
		WARNING_MSG(boost::format("DBInterfaceMysql::processException: "
				"Exception: %1%\nlastquery=%2%\n") %
			dbe->what() % lastquery_);
	}

	return retry;
}

示例#2

文件： db_interface_mysql.cpp 项目： nichunen/kbengine

//-------------------------------------------------------------------------------------
bool DBInterfaceMysql::processException(std::exception & e)
{
	DBException* dbe = static_cast<DBException*>(&e);
	bool retry = false;

	if (dbe->isLostConnection())
	{
		INFO_MSG(fmt::format("DBInterfaceMysql::processException: "
				"Thread {:p} lost connection to database. Exception: {}. "
				"Attempting to reconnect.\n",
			(void*)this,
			dbe->what()));

		int attempts = 1;

		while (!this->reattach())
		{
			ERROR_MSG(fmt::format("DBInterfaceMysql::processException: "
							"Thread {:p} reconnect({}) attempt {} failed({}).\n",
						(void*)this,
						db_name_,
						attempts,
						getLastError()));

			KBEngine::sleep(30);
			++attempts;
		}

		INFO_MSG(fmt::format("DBInterfaceMysql::processException: "
					"Thread {:p} reconnected({}). Attempts = {}\n",
				(void*)this,
				db_name_,
				attempts));

		retry = true;
	}
	else if (dbe->shouldRetry())
	{
		WARNING_MSG(fmt::format("DBInterfaceMysql::processException: Retrying {:p}\nException:{}\nnlastquery={}\n",
				(void*)this, dbe->what(), lastquery_));

		retry = true;
	}
	else
	{
		WARNING_MSG(fmt::format("DBInterfaceMysql::processException: "
				"Exception: {}\nlastquery={}\n",
			dbe->what(), lastquery_));
	}

	return retry;
}